Its pretty easy to get marking schemes. Most teachers who have marked the papers before have it. For me I have a relative who is teaching BM, she gets her friends to pass me all the marking schemes few months before SPM.

yo! my ex teacher (pencen already) open a class at her house, each sub cost 150 per month per student. each class consist of about 30 - 40 student. she teaches 2 sub - Bahasa Malaysia and History for SPM students (form 4 & form 5). imagine if she got 120 student (about 4 class a week?)
300 x 120 = 36000 with just 4 class week maybe at most 4 hours per day (2 hours history, 2 hours Bahasa). Tell me if this is not enough for you.
Another story, my friend (parent rich people) go to private tutor who teach accounts, physics and chemistry . i dont know how many time per week but it cost about 2000 per student. each class only max of 5 student. imagine that. so being a teacher does pay well.
another story - i heard that these days, if u work as a gov teacher, u cant do tution. i dont know the details. just heard only.
Good luck!

Hmmm. Talking about marking schemes, I just saw sasbadi had these past yr papers with the answers inside. Not sure whether its the original marking scheme or the marking scheme by sasbadi. Everything will change including the syllabus so what is your point?

If you work as a gov teacher, you are not legally entitled to do tuition. HOWEVER, since many teachers do it and it would be kind of stupid to do a crackdown on tuitions, not many are actually penalised.